Hair went too dark. What to do?

I've done it again. Had a light to medium blonde on the top layer
of my hair with dark brown everywhere else. It was too much to
keep up at once and since I bought dark brown extentions for
Halloween... I just went ahead and dyed all of my hair dark brown
again. I see now that I should've gone with light brown.

My hair has turned SO dark, it's nearly black. I'd still like to keep it
brown, just not this dark. A light brown or medium brown would
be better. How can I lighten this? Any ways you can think of...
trying not to damage the hair too much as I'm trying to let it grow
out... but I went and mucked it up and I guess I've got to fix it
somehow. Whatever help you guys can provide is always appreciated!

Thanks!!

 

You know, I was also wondering about those hairdyes that are
made for "dark hair only". On the box, it looks like it'll take dark
hair up a bit and lighten it to whatever color... like a light brown
I think some are red - just like regular hair dye. But instead of
darkening the color, it lightens it. Anybody know if these work?
I think they're made by Loreal.